1.
Rahmi E, Suwardi S, Sumawinata B. Characterization of Humic Substance Extracted from Andisols, Spodosols, Peat, and Lignite. Sains Tanah J. Soil Sci. Agroclimatology [Internet]. 2018 Jul. 2 [cited 2026 Oct. 6];15(1):35-4. Available from: https://jurnal.uns.ac.id/tanah/article/view/21622